20 lines
740 B
Rust
20 lines
740 B
Rust
enum T { A(U), B }
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enum U { C, D }
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fn match_nested_vecs<'a, T>(l1: Option<&'a [T]>, l2: Result<&'a [T], ()>) -> &'static str {
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match (l1, l2) { //~ ERROR non-exhaustive patterns: `(Some(&[]), Err(_))` not covered
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(Some(&[]), Ok(&[])) => "Some(empty), Ok(empty)",
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(Some(&[_, ..]), Ok(_)) | (Some(&[_, ..]), Err(())) => "Some(non-empty), any",
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(None, Ok(&[])) | (None, Err(())) | (None, Ok(&[_])) => "None, Ok(less than one element)",
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(None, Ok(&[_, _, ..])) => "None, Ok(at least two elements)"
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}
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}
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fn main() {
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let x = T::A(U::C);
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match x { //~ ERROR non-exhaustive patterns: `T::A(U::C)` not covered
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T::A(U::D) => { panic!("hello"); }
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T::B => { panic!("goodbye"); }
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}
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}
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